Hillary Clinton’s health just became a real issue in the presidential campaign

Video of Clinton's departure seemed to show her buckling and stumbling as she got into her van. (Thomas Johnson/The Washington Post)

Hillary Clinton falling ill Sunday morning at a memorial service on the 15th anniversary of the Sept. 11 attacks will catapult questions about her health from the ranks of conservative conspiracy theory to perhaps the central debate in the presidential race over the coming days.

"Secretary Clinton attended the September 11th Commemoration Ceremony for just an hour and thirty minutes this morning to pay her respects and greet some of the families of the fallen," spokesman Nick Merrill said. "During the ceremony, she felt overheated, so departed to go to her daughter's apartment and is feeling much better."

What that statement leaves out is that a) it came 90 minutes after Clinton left the ceremony b) reporters — or even a reporter — were not allowed to follow her and c) the temperature in New York City at the time of Clinton's overheating was in the low 80s. (A heat wave over the eastern United States broke last night/this morning.)

She later left her daughter's apartment, saying she was "feeling great" and waving at the crowd, per the Associated Press. Clinton was diagnosed Friday with pneumonia, according to her doctor, who ascribed her illness on Sunday to that ailment.

Donald Trump responded to Hillary Clinton's recent diagnosis of Pneumonia on Monday, Sept. 12, saying he hopes she "gets well" and he plans to release "very, very specific" details about his own health soon. (Jenny Starrs,Bastien Inzaurralde/The Washington Post)

That talk was largely confined to Republicans convinced that Clinton has long been hiding some sort of serious illness. I wrote dismissively of that conspiracy theory in this space last week, noting that Clinton had been given an entirely clean bill of health by her doctors after an episode in which she fainted, suffered a concussion and then was found to have a blood clot in late 2012 and early 2013.

Coughing, I wrote, is simply not evidence enough of any sort of major illness that Clinton is assumed to be hiding. Neither, of course, is feeling "overheated." But those two things happening within six days of each other to a candidate who is 68 years old makes talk of Clinton's health no longer just the stuff of conspiracy theorists.

Whereas Clinton and her campaign could laugh off questions about her health before today, the "overheating" episode makes it almost impossible for them to do so. Not only has it come at a time when there was growing chatter — with very little evidence — that her health was a problem but it also happened at a 9/11 memorial event — an incredibly high-profile moment with lots and lots of cameras and reporters around.

Clinton may well be totally fine — and I certainly hope she is. But we are 58 days away from choosing the person who will lead the country for the next four years, and she is one of the two candidates with a real chance of winning. Taking the Clinton team's word for it on her health — in light of the episode on Sunday morning — is no longer enough. Reasonable people can — and will — have real questions about her health.

The simple fact is that there is zero evidence that anything is seriously wrong with Clinton. If suffering an occasional coughing fit is evidence of a major health problem, then 75 percent of the country must have that mystery illness. And I am one of them.

Well, that is no longer operative. Context matters. A coughing episode is almost always just a coughing episode. But when coupled with Clinton's "overheating" on Sunday morning — with temperatures something short of sweltering — Clinton and her team simply need to say something about what happened (and why the press was in the dark for so long.)

And as the New York Times's Adam Nagourney tweeted on Sunday morning, now might be a good time for Clinton to release a fuller record of her medical history.

Feels like a good day for Clinton to release her medical records and call on Trump to do same